Actually, you should be scheduling in one rest day every week. What rest day means often depends on your fitness level and length of time you have been exercising. For very active people who have been exercising for months, a rest day might mean a hike or yoga. But for a beginner, a rest day should be a rest day with leisurely activities only. Your body grows stronger as it rebuilds during rest. If you don't allow rest, you are creating too much stress on your body and not allowing time to maximize all of your hard work.